Power System Small-Signal Stability Analysis

Power system small-signal stability analysis typically employs the small-disturbance method, which involves calculating eigenvalues of the coefficient matrix from approximate linear differential equations. Based on the characteristics of eigenvalues in the complex plane, system stability can be determined. Implementation requires user input for six key parameters: initial complex power S0 (in a+bi format), infinite bus voltage V0, direct-axis equivalent reactance Xd, synchronous angular speed, inertia time constant Tj, and comprehensive damping coefficient D.